Shape wise I dont see them changing much. Probably larger screen with OLED technology with higher Res. Probably front facing camera for chat, and a better camera with some sort of flash.
Dual core? If they're willing to put in a battery the size of Cuba, then yes, by all means they will, but people might actually think twice about lugging a country around in their pocket. Feasible if they're clocked at low speeds, but then it would have to work hard anyway to deal with what the user would want it to do?
Oh, and apple will probably introduce this new fangled feature called 'multi-tasking' that is so cool and new and hip. Remember cut and paste anyone?
OS 4.0 which will probably make older iphones run slower (OS 3.0 did to some extent).
Memory, I'm sure I read an article that the flash chip used for the memory was successfully doubled in capacity by the manufacturer, so be on the look out for 128gb iphones and ipod touches.
4G...probably, new standards of wifi/connectivity etc.
New touch screen technology, don't put it past apple to push the boundarys and make something that will have the fan boys worshipping the thing like a god.
Battery will more than likely not be removeable, and theyll make it harder to jailbreak with additional hardware more than likely.
Expect upgrade in services for the iphone or something new entirerly. Mobile Me, Nike + stuff like that.
Basically, you know, what they've done for the last 3 years on the trot, just update something newer thats just as slick, that people will queue around the block for, and moan and whine about how they cant get one because their current contract is still going.
Sorry, I just find it funny people try to get out of a contract they signed up for knowing it was for X months and are shocked when they realise it's pretty hard to or they'll have to fork over money to do it.
Just my 2 pence
